#turtle库三角形
import turtle
turtle.pencolor("blue")
turtle.pensize ("10")
turtle.pendown()
turtle.fd(200)
turtle.left(120)
turtle.fd(200)
turtle.left(120)
turtle.fd(400)
turtle.left(120)
turtle.fd(400)
turtle.left(120)
turtle.fd(200)
turtle.left(120)
turtle.fd(200)
turtle.right(120)
turtle.fd(200)
